CN201553013U - RWD type hybrid drive system - Google Patents

Abstract

The utility model discloses a driving system of a rear-drive type hybrid car, which includes an engine, a small motor and a large motor. The drive system also includes a rear-drive reduction differential and an electronically controlled clutch. The engine and the small motor Longitudinally placed in the front cabin of the car, one end of the small motor is connected to the crankshaft of the engine, and the other end is optionally connected to the large motor placed under the floor of the luggage compartment through an electronically controlled clutch, and the large motor is connected to the rear drive reduction differential at the same time . The hybrid drive system of the utility model adopts a dual-motor mode, and the torque of the engine can be directly output to the rear drive deceleration differential through the small motor and the large motor, and at the same time, the large motor is placed behind, which greatly simplifies the structure of the entire hybrid drive system , which is convenient for the spatial arrangement of the front cabin, and can improve the transmission efficiency of the drive system and the dynamic performance of the vehicle.

Description

The hybrid electric drive system of rear-guard pattern

Technical field

The utility model relates to a kind of automobile power drive system, relates to a kind of hybrid electric drive system of rear-guard pattern particularly.

Background technology

Hybrid vehicle is as a kind of emerging energy-efficient, environment-friendly automobiles, and its technology and market are in a kind of flourish stage.At present, mostly the power-driven system of hybrid power car is on the basis of combustion engine (driving engine) drive system that the preposition forerunner of original employing arranges, increase by one or two motors, and, be delivered to wheel by main reduction gear and diff again by of the output torque coupling of a planet circular system with driving engine and motor.Because driving engine, motor, planet circular system and retarder etc. are arranged in the car forward engine room, and the space of car forward engine room is limited, thereby make the layout difficulty of whole power-driven system high, and be unfavorable for the parts type selecting coupling of car and selecting for use of heavy-duty motor; In addition,, both increased manufacturing cost, increased the complexity of drive system control and the layout difficulty of drive system simultaneously owing to kept change-speed box.

A kind of publication number is two electric control clutch hybrid power automobile driving systems of CN 101021244A, form by combustion engine, two electric control clutchs, motor, two electric control clutch automatic transmission with hydraulic torque converter, single planetary row mechanism and mouths, this driving system combines by single planetary row Agency And electric control clutch change-speed box and shifts gears, and can realize multiple mode of operations such as internal combustion engine drive, electronic, combination drive, regenerative brake.Owing to kept change-speed box and a single planetary row mechanism equally, therefore, its complex structure is unfavorable for the layout of drive system, has also increased the control difficulty of drive system simultaneously.

The utility model content

The purpose of this utility model is to overcome driving system structure complexity that prior art exists, arranges the big deficiency of difficulty, a kind of simple in structure, arrangement convenience is provided, can selects the hybrid electric drive system of the rear-guard pattern of heavy-duty motor for use.

To achieve these goals, the utility model is by the following technical solutions: a kind of hybrid power car driving system of rear-guard pattern, comprise driving engine, small machine and big motor, described drive system also comprises rear-guard deceleration differential and electric control clutch, described driving engine and small machine vertically place the car forward engine room, small machine one end is connected with the bent axle of driving engine, the other end can be selected to be connected with the big motor under placing luggage compartment floor by electric control clutch, and described big motor is connected with the rear-guard deceleration differential simultaneously.Hybrid electric drive system of the present utility model adopts back-wheel drive, owing to be provided with electric control clutch, therefore can utilize the characteristics of big motor low-speed big, drive trailing wheel with big motor by the rear-guard deceleration differential, realize the pure electronic starting of vehicle, the electric control clutch of this moment does not engage; When vehicle when normal speed is travelled, can be by the small machine start the engine, control electric control clutch then and engage, provide power by driving engine this moment, drives trailing wheel by the rear-guard deceleration differential and travel, big motor is not then worked and is in idling conditions; And vehicle brish acceleration or when climbing, the big machine operation of may command is in drive pattern, thereby can provide auxiliary power to drive automobile to trailing wheel, also can make small machine work in drive pattern equally according to demand this moment, so that bigger driving power to be provided; When vehicle during at descending, electric control clutch is separated, and control big machine operation in power generation mode, thereby with the vehicle braked Conversion of energy be electric energy with to battery charge, satisfying under the prerequisite of deceleration and stopping performance, reclaim braking energy, reduce fuel oil consumption; In addition, by adjusting to the small machine workload, can carry out reasonable distribution to the moment of torsion of driving engine output, when vehicle is travelling than the low velocity zone or load when light, the unnecessary power of driving engine can be used for the generating of small machine and to battery charge, so that make engine operation, and then improve efficiency of engine in economical consumption of fuel and low emission zone.Therefore, hybrid electric drive system of the present utility model can by to the control of small machine and big electrical machine working mode to guarantee that engine operation is in a desirable economical consumption of fuel and low emission zone, be used for shifted change-speed box thereby can save with raising engine operation efficient, the moment of torsion of driving engine passes through small machine, electric control clutch, big motor and rear-guard deceleration differential are directly delivered to trailing wheel, further, because big motor is arranged under the luggage compartment floor, and can pass through rear-guard deceleration differential direct drive trailing wheel, therefore, not only simplified the structure of whole drive system greatly, the spatial destribution that helps forward engine room also can improve the driving efficiency of drive system simultaneously; In addition since run at high speed or load when big big motor and small machine auxiliary power can be provided, thereby help improving the tractive performance of car load.

As preferably, the reduction ratio of described rear-guard deceleration differential is made as 4～6.Engine torque of the present utility model is that the rear-guard deceleration differential of reduction ratio is delivered to trailing wheel by having fixedly, therefore select rational reduction ratio, can guarantee the maximum speed of vehicle on the one hand, help simultaneously guaranteeing that driving engine all can be in economical consumption of fuel and low emission zone at a high speed or than low speed driving the time, and can take into account vehicle and have tractive performance preferably at a bigger speed range intrinsic motivation.

As preferably, described small machine adopts the ISG motor.The ISG motor has the characteristics of quick start, can be in about 0.3 second time the quick operated start driving engine, therefore, driving engine is quick operated start at any time, when the need short time such as running into red light stops, driving engine need not to be operated in idling mode, thereby can significantly reduce the idle exhaust emission of driving engine, and saves fuel oil.

In sum, the utlity model has following beneficial effect: adopt the double-motor pattern, the moment of torsion of driving engine can directly output to the rear-guard deceleration differential by small machine and big motor, simultaneously with big motor postposition, simplified the structure of whole hybrid electric drive system greatly, be convenient to the spatial destribution of forward engine room, can improve the driving efficiency of drive system and the tractive performance of car load.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

In the embodiment shown in fig. 1, the hybrid electric drive system of a kind of rear-guard pattern of the present utility model, comprise the driving engine 1 and the small machine 2 that vertically place forward engine room, place big motor 5 and rear-guard deceleration differential 6 under the luggage compartment floor, described small machine 2 adopts the ISG motor, the bent axle of driving engine 1 is connected with the rotor of small machine 2, and be connected with the active friction plate of an electric control clutch 4 by a transmission shaft 3 that vertically is provided with, then being connected of electric control clutch 4 with the rotor of big motor 5 from movable friction plate, the rotor of big motor 5 arrives trailing wheel by connected rear-guard deceleration differential 6 with transmission of power, the reduction ratio of described rear-guard deceleration differential 6 is 5, can be selectively the moment of torsion of driving engine 1 be delivered to trailing wheel by rear-guard deceleration differential 6 by the switching of control electric control clutch 4.

Doing one with regard to basic functional principle of the present utility model below describes in detail.

Starting: the utility model adopts the electric-only mode starting, and the electric control clutch 4 of this moment is in released state, and vehicle drives the trailing wheel starting by big motor 5 by rear-guard deceleration differential 6.

Cruising: when vehicle start and when reaching cruising speed, if the SOC of storage battery (not shown) (storage battery state-of-charge) is higher, can continue to adopt pure power mode to drive trailing wheel and travel, can realize the stepless change of vehicle by the rotating speed of controlling big motor 5 by big motor 5; If the SOC of storage battery is lower, can be by small machine 2 start the engines 1, and control electric control clutch 4 active friction plate and from the movable friction plate combination, the moment of torsion of driving engine 1 was delivered to trailing wheel by small machine 2, transmission shaft 3, electric control clutch 4, big motor 5 and rear-guard deceleration differential 6 and travelled with powered vehicle this moment, controlled big motor 5 simultaneously and made it be in the off working state of idle running and do not participate in driving; And when Vehicle Speed slow or load hour, may command small machine 2 makes it work in power generation mode, driving engine 1 unnecessary power can be used for driving small machine 2 generatings, being used for battery charge, thereby improves the work efficiency of driving engine 1; When vehicle brish acceleration or climbing, in order to guarantee that vehicle has stronger dynamic property, big motor 5 of may command and small machine 2 are operated in drive pattern, this moment, big motor 5 and small machine 2 were as the auxiliary power powered vehicle, both guaranteed that vehicle had enough power, and made driving engine 1 energy normal operation again in economical consumption of fuel and low emission zone.

Slow down and braking: when vehicle descending or deceleration, the active friction plate of may command electric control clutch 4 with separate from movable friction plate, and make big motor 5 work in power generation mode, this moment, the inertia kinetic energy of vehicle passed to big motor 5 by trailing wheel by rear-guard deceleration differential 6, make 5 generatings of big motor with to battery charge, and the big motor 5 of this moment can play and slow down and the effect of braking to vehicle as a load.

Parking: when vehicle is in the Parking state,, can directly kill engine 1, with the idle exhaust emission that reduces vehicle and save fuel oil if the electric weight of storage battery is enough; If the accumulator electric-quantity deficiency, then may command driving engine 1 works in idling mode, and makes small machine 2 work in power generation mode, and at this moment, electric control clutch 4 separates, and driving engine 1 directly drives small machine 2 and generates electricity, with to battery charge.

Reversing: when vehicle need be moveed backward, may command electric control clutch 4 separated, and changes the rotation direction of big motor 5, can realize the reversing of vehicle by big motor 5 reverse drive trailing wheels.

Claims (3)

1. a hybrid drive system of rear drive type, comprising motor, small motor and large motor, is characterized in that, described drive system also includes rear drive reduction differential (6) and electronically controlled clutch (4), The engine (1) and the small motor (2) are placed longitudinally in the front cabin of the car, one end of the small motor (2) is connected to the crankshaft of the engine (1), and the other end is connected to the crankshaft of the engine (1) through an electronically controlled clutch (4) and is located on the floor of the luggage compartment. The lower large motor (5) can be selectively connected, and the large motor (5) is connected with the rear drive reduction differential (6) simultaneously. 2 . The rear-drive type hybrid drive system according to claim 1 , characterized in that, the reduction ratio of the rear-drive reduction differential ( 6 ) is set to 4-6. 3 . 3. The rear drive type hybrid drive system according to claim 1 or 2, characterized in that the small motor (2) is an ISG motor.

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